E-file rejected-says I have to print & mail it in

Completed taxes and electronically submitted federal and state. Both came back rejected. Turbotax explanation shows "an XML document that represents a binary attachment must have a valid reference to an attached file. This return cannot be electronically processed. To file this return, print and mail it to the appropriate IRS Service Center." I have no idea what this explanation means & I prefer to submit electronically. I've already been charged by TT for the state return submission. Anyone have this problem and have a solution? Or at least point me in the direction to get some support from TT!!